package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;
    @Autowired
    private MinioProperties minioProperties;
    /**
     * todo:逻辑：
     *          1.注入minioClient,MinioProperties
     *           2.判断桶是否存在，
     *            2.1不存在,创建桶并设置访问权限
     *            2.2存在，继续
     *           3.上传文件
     *           4.返回拼接url,endpoint/bucketName/objectName
     * todo:注意；
     *          文件命名：
     *             1.防止文件重名：uudi+file.getOriginalFilename();
     *             2.解决文件放在桶中太乱问题:20241210/UUID_文件名
     * @param file
     * @return
     */
    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
//      // 2.判断桶是否存在，
        boolean exists = minioClient.bucketExists(BucketExistsArgs.builder()
                .bucket(minioProperties.getBucketName()).build());

        if(!exists){
            //2.1不存在,创建桶
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .build());
            //设置桶的访问权限
            String policy = """
                        {
                          "Statement" : [ {
                            "Action" : "s3:GetObject",
                            "Effect" : "Allow",
                            "Principal" : "*",
                            "Resource" : "arn:aws:s3:::%s/*"
                          } ],
                          "Version" : "2012-10-17"
                        }""".formatted(minioProperties.getBucketName());
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .config(policy)
                    .build());
        }
        /*
            todo:文件命名：
                 1.防止文件重名：uudi+file.getOriginalFilename();
                 2.解决文件放在桶中太乱问题:20241210/UUID_文件名
         */
        // 生成对象名：20241210/UUID_文件名
        String objectName = new SimpleDateFormat("yyyyMMdd").format(new Date())+"/" +UUID.randomUUID().toString().replace("-", "") + "_" + file.getOriginalFilename();
        //3.以文件流方式，上传运行内存文件
        minioClient.putObject(PutObjectArgs.builder()
                .bucket(minioProperties.getBucketName())
                .object(objectName)
                .stream(file.getInputStream(),file.getSize(),-1)
                .contentType(file.getContentType())
                .build());
        //4.返回拼接url,endpoint/bucketName/objectName
        return String.join("/",minioProperties.getEndpoint(),minioProperties.getBucketName(),objectName);
    }
}
